Heating attachment for hot-water bags.



No. 840,060. PATENTED JAN. 1, 1907.

O; VAN D. HILL.

HE ATING ATTACHMENT FOR HOT WATER BAGS. APPLICATION FILED NOV.'15, 1905.

lnuamoh Q. Charles V. D. H H I zmew b CHARLES VAN 'DYKE HILL, on ST. Louis, MISSOURI.

HEATING ATTACHMENT FOR HOT-WATER BAGS.

Specification of Letters Patent.

1 Patented Jan. 1, 1907.

Application filed November 15, 1905. Serial No. 287.470.

To all whom it may concern.-

Be it known that 1, CHARLES VAN DYKE, HILL, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in'Heating Attachments for Hot-VVater Bags, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, forming part of this specification, in which 4 v V Figure l is a sectional view showing my improved heating attachment for hot-water bags, and Fig. 2'is an enlarged cross-sec; tional view on the line 2 2 of Fig.1.

This invention relates to a new and useful improvement in heating attachments for hotwater bags, the object being to arrange on the stopper or closure of the bag a heating- .coil in an electric circuit, whereby when water is placed in the bag and the stopper screwed in position to retain the water in the bag the currentcan be passed through the heating-coil and maintain the water at a desired degree of temperature for an indefinite period of time. V

In the drawings, 1 indicates the bag, which, as usual, is made of rubber, and I prefer to have in connection with my attachment a hot-water bag such as can be purchased in the open market, so that in the event that the heating attachment becomes disarranged an ordinary screw-stopper, such as sold with the bag, can be employed and the bag used in the usual way.

The neck of the bag is provided with a female thread, into which the stopper is screwed to retain the water in the bag, and

in my improvement the threads of the stop- Qper, which engage the threads in the neck of thebag, are formed on a guard-tube, (marked 2 in the drawings.) This guard-tube is pref erably perforated all around, as shown in Fig. 2, so that water can have access to the heating-tube 3, and at the same time the heating-tube 3 is prevented from coming in direct contact with the rubber walls of the bag 1. The lower end of the heating-tube 3 is closed, as shown, and the upper end is expanded or otherwise secured within the The number of turns of the resist ance-wire 5 and amount of resistance offered to a current of known voltage determines the degree of heat generated in the tube 3.

.- The outer end of tube 2, above the thread- I ed portion thereof, is preferably enlarged, so as to form a shoulder for the purpose of cooperating with the outer face of the neck of the bag. In this enlarged portion of tube 2 is ar ranged an insulation-block 6, carrying the terminals 7 of the resistance-wire. 3 These terminals are in the form of posts or pins and extend above the face of the insulation-block 6, so asto cooperate with sockets 8 in an insulation-block 9. The walls of these sockets 8 are preferably split, so as to be yielding, whereby they may frictionally engage the ends of posts 7. The wires leading to sockets 8 preferably connect with an electric plug 10, and the wires are of such length that said plug may be introduced in an ordinary lampsocket. If for any reason it is desired to cut off the supply of electricity to the heatingtube, the same may be done by the switch in the lamp-socket, or the plug 10 may be removed from the bag. thumb-pieces by which the stopper can be screwed into the bag. If desired, a rheostat may be employed to cut in resistance, so as to regulate the temperature of water inthe The terminals 7 afiord per for closing said opening, an electric heat- 1 ing-coil extencing inwardly from said stopthreaded portion of the tube 2 above the per- I per into the bag, an insularing block'mountforations, so as to prevent water in the bag i ed in an enlarged portion of said stopper and from passing into the tube 3.

position may be employed.

Any suitable carrying the terminals of the heating-coil means of securing the closed-ended tube 3 in l which project upwardly from said block, and a removable insulating-block provided with terminal sockets which cooperate with the 'termina s. of the heating-coil; substantially as described.

2. electric heating attachlnent forhot-g Water bags, the same comprising a perforated I guard-tube having a threaded portion and an enlarged portion forming a shoulder, an inner closed-ended tube arranged insaid guardtube, a resistance-coil in said inner tube, an insulation-block mounted in the enlarged portion of said guard-tubefland through which theterminals of, said resistancercoil 1 In testimonj whereof I hereunto afiix my signature, in thepresence of tW'o Witnesses;

this 11th day of November, 1905.

CHARLES VAN DYKE HILL.

, Witnesses: F. R. CORNWALL,-

GEORGE BAKE-WELL. 

